Temp gauge dash light
Replace the bulb then.
How do I find the bulb
Of course it is going to be in the area of the temperature gauge. To get at it the instrument cluster would need to be take out.
Well do I need a special tool for that
No not really, but I would take it to someone who knows how to do it, as the cluster is a delicate part, so you wouldn't want to damage it. For someone who has done this before, it should only take 15 to 30 minutes to replace.
Looking for a Used LeSabre in your area?
CarGurus has 2,599 nationwide LeSabre listings starting at $1,450.
Search Buick LeSabre Questions
Buick LeSabre Experts